Chevrolet T-Series Owner's Manual page 279

Air brake chamber service (or every 2 months,
whichever occurs first). (28)
Fuel tank, fuel cap, and fuel lines service
(or every 72 months, whichever occurs
first). (2) (21) †
Thermostatically controlled engine cooling
fan service. (3) (17)
Shields and underhood insulation
service. (3) (4) (18)
82,500 Miles (132 000 km)
Check fluid levels (or every 3 months,
whichever occurs first). (1) (5)
Chassis lubrication service (or every 6 months,
whichever occurs first). (10)
Wheels and tires service. (13)
Hydraulic brake service (or every 6 months,
whichever occurs first). (6) (30)
Parking brake service (or every 6 months,
whichever occurs first). (7)
Air brake service (or every 6 months, whichever
occurs first). (26)
Air brake automatic slack adjuster service (or
every 500 hours, whichever occurs first). (27)
Check air brake relay valve operation and check
for leaks (or every month, or every 300 hours,
whichever occurs first).
Clean air brake application valve (or every
3 months, or every 300 hours, whichever occurs
first). Lubricate linkage.
Air brake chamber service (or every 2 months,
whichever occurs first). (28)
84,000 Miles (140 000 km)
Vehicles Without Engine Oil Life System Only:
Change engine oil and filter (or every 12 months,
or every 600 hours of engine operation,
whichever occurs first). (2)
Vehicles With Engine Oil Life System Only:
Check oil life system (or every 12 months, or
every 600 hours of engine operation, whichever
occurs first). If engine oil and filter are changed,
reset system. See Engine Oil Life System
on page 190. (2) (8)
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